Many rely on the E111 card you can get which is an agreement with certain European countries to exchange free medical treatment. You need to be aware though that following an accident, the ambulance will take you to the nearest hospital, which could be private. In this case your E111 card will have no value.
There are other considerations to make rather than jut medical treatment. What would you do if all your credit cards were stolen, or all your cash? A usa holiday direct line travel insurance policy can help you with these types of issues, to ensure your holiday trauma is at least reduced and be covered financially.
Worldwide travel is becoming more assessable with more flights than ever leaving the UK everyday to destinations our parents and grand parents could only dream of. Worldwide travel insurance will cover you for most destinations for most things that could ruin your trip away. But be aware that there are still some countries not covered under some travel policies.
Your pet may not be covered if you take it away on a British holiday with you. You should look at your pet insurance policy to see if your animal is covered whist on holiday or away from home.